Rhodamine 6G Removal from aqueous solution with Coconut Shell-Derived Nanomagnetic Adsorbent Composite (CS-NMAC): isotherm and kinetic studies

Palsan Sannasi Abdullah, . and Lim Kai Wen, . and Huda Awang, . and Siti Nuurul Huda Mohammad Azmin, . Rhodamine 6G Removal from aqueous solution with Coconut Shell-Derived Nanomagnetic Adsorbent Composite (CS-NMAC): isotherm and kinetic studies. pp. 1535-1556. ISSN 2231-8526

Untreated effluents from the textile industry containing colorant dyes are harmful to the environment aquatic organisms and human health. Among these effluents Rhodamine 6G is known as a corrosive and irritant dye. A coconut shell-derived nanomagnetic adsorbent composite (CS-NMAC) was developed to remove Rhodamine 6G from aqueous solution. Physical and adsorption properties of CS-NMAC were characterized via Brunauer“Emmett“Teller (BET) surface area analysis (SBET: 1092.17 m2/g; total pore volume: 0.6715 cm3/g) X-ray diffraction (Fe3O4 35.522 Fe2O3 35.720 and FeO 41.724) and Fourier transform infrared spectroscopy (Fe“O C“H asymmetric CCC CN and O“H). CS-NMAC was found to be electropositive within a broad pH range of 3“10) owing to the presence of nanoscale iron oxides on the surface of the coconut shell-derived adsorbent that enhanced the chemical and electrochemical outputs. Isotherm study revealed that the adsorption process of Rhodamine 6G followed a multilayer type of adsorption onto a heterogeneous surface. Freundlich model fitted better (R2 0.981) than the other models (Langmuir Temkin and BET). The maximum adsorption capacity was 32.02 mg/g. Rhodamine 6G removal by CS-NMAC obeyed the pseudo-second-order reaction (R2 0.9995) as opposed to other kinetic models. CS-NMAC has the potential to become an effective treatment for dye pollution.

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Abstract

Untreated effluents from the textile industry containing colorant dyes are harmful to the environment aquatic organisms and human health. Among these effluents Rhodamine 6G is known as a corrosive and irritant dye. A coconut shell-derived nanomagnetic adsorbent composite (CS-NMAC) was developed to remove Rhodamine 6G from aqueous solution. Physical and adsorption properties of CS-NMAC were characterized via Brunauer“Emmett“Teller (BET) surface area analysis (SBET: 1092.17 m2/g; total pore volume: 0.6715 cm3/g) X-ray diffraction (Fe3O4 35.522 Fe2O3 35.720 and FeO 41.724) and Fourier transform infrared spectroscopy (Fe“O C“H asymmetric CCC CN and O“H). CS-NMAC was found to be electropositive within a broad pH range of 3“10) owing to the presence of nanoscale iron oxides on the surface of the coconut shell-derived adsorbent that enhanced the chemical and electrochemical outputs. Isotherm study revealed that the adsorption process of Rhodamine 6G followed a multilayer type of adsorption onto a heterogeneous surface. Freundlich model fitted better (R2 0.981) than the other models (Langmuir Temkin and BET). The maximum adsorption capacity was 32.02 mg/g. Rhodamine 6G removal by CS-NMAC obeyed the pseudo-second-order reaction (R2 0.9995) as opposed to other kinetic models. CS-NMAC has the potential to become an effective treatment for dye pollution.

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Item Type:	Article
AGROVOC Term:	Textile industry
AGROVOC Term:	Textiles
AGROVOC Term:	Textile fibres
AGROVOC Term:	Dyes
AGROVOC Term:	Industrial pollutants
AGROVOC Term:	Adsorption
AGROVOC Term:	Solvent removal
AGROVOC Term:	Coconuts
AGROVOC Term:	Agricultural wastes
AGROVOC Term:	Reduction of pollution
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9499

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